The DSM-IV Diagnostic Criteria for Narcissistic Personality Disorder are:

A. A pervasive pattern of grandiosity, need for admiration, lack of empathy, as indicated by at least five of:

1. a grandiose sense of self-importance
2. is preoccupied with fantasies of unlimited success, power, brilliance, beauty, or ideal love
3. believes that he or she is "special" and can only be understood by, or should associate with, other special or high-status people (or institutions)
4. requires excessive admiration
5. has a sense of entitlement, ie unreasonable expectations of especially favourable treatment or automatic compliance with his or her expectations
6. is interpersonally exploitative, ie takes advantage of others to achieve his or her own ends
7. lacks empathy and is unwilling to recognize or identify with the feelings and needs of others
8. is often envious of others or believes that others are envious of him or her
9. shows arrogant, haughty behaviours or attitudes